EP 0221888 B1 19910724 - PROCESS FOR REMOVING OXALIC ACID FROM ACIDIC FERMENTATION LIQUIDS OF CITRIC ACID-FORMING MICROORGANISMS
Title (en)
PROCESS FOR REMOVING OXALIC ACID FROM ACIDIC FERMENTATION LIQUIDS OF CITRIC ACID-FORMING MICROORGANISMS
Publication
Application
Priority
AT 321285 A 19851107
Abstract (en)
[origin: EP0221888A2] In this process, oxalic acid is precipitated as sparingly soluble calcium oxalate and the calcium oxalate is separated off. In order to remove the oxalic acid from the fermentation liquids as completely as possible and in an operationally safe manner and nevertheless prevent coprecipitation of sparingly soluble salts of citric acid without complicated monitoring measures in a reliable manner and moreover to increase the yield of citric acid obtainable from the fermentation liquids, the precipitation is carried out by adding calcium sulphate to the fermentation liquid before or after separation of the microorganism cells.
IPC 1-7
IPC 8 full level
C07C 51/41 (2006.01); C07C 51/43 (2006.01); C12P 7/46 (2006.01)
CPC (source: EP)
C07C 51/412 (2013.01); C07C 51/43 (2013.01); C12P 7/46 (2013.01)
Designated contracting state (EPC)
DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0221888 A2 19870513; EP 0221888 A3 19881130; EP 0221888 B1 19910724; AT 383367 B 19870625; AT A321285 A 19861115; DE 3680461 D1 19910829; YU 187286 A 19880229; YU 44933 B 19910430
DOCDB simple family (application)
EP 86890293 A 19861030; AT 321285 A 19851107; DE 3680461 T 19861030; YU 187286 A 19861104